The Stool Pigeonis 2010 Hong Kong action film directed by Dante Lam and starring Nicholas Tse , Nick Cheung and Kwai Lun-mei . The film is about police detective Don Lee who uses informants to gain information about gangsters. Lee feels begins to feel guilty when his informants are caught, but sends out a street racer named Ghost ( Nicholas Tse ) as an informant to gain information about a gangster name Barbarian ( Lu Yi ).

The film was released in China on August 24 and two days later in Hong Kong. The film performed very well in the Hong Kong box office. The film has received mixed reviews.

Don Lee ( Nick Cheung ), a police detective in Kowloon whose reliance on informants leaves him struggling with a guilty conscience. Lee's previous stool pigeon 's cover was blown and was attacked, leading him paranoid and driven from his wife and home. Lee begins to doubt his own methods. Lee recruits a street racer named Ghost ( Nicholas Tse ) as his latest stool pigeon who is assigned to infiltrate a gang lead by the notorious armed robber Barbarian ( Lu Yi ). Ghost accepts Lee's offer so he can rescue his sister from a life of prostitution as well as help his father's one-million dollar debt. Ghost joins an illegal street race to gain acceptance into Barbarian's gang. Lee also has personal problems of his own, as wife Cher ( Miao Pu ) who he is separated with tried to commit suicide a few months previously and has since had amnesia. Lee beings to realizes how wrong he has by exploiting his informants and desperately tries to right his wrong before Ghost is in serious trouble.